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2 years ago

Can someone help me, please???

Mathematics

1 answer:

harina [27]2 years ago

6 0

Answer:

Step-by-step explanation:

4 times 3 = 12

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Yesterday, a movie theater sold 299 bags of popcorn. A large bag of popcorn costs $4. A small bag of popcorn costs $1. In all, t

dem82 [27]

Answer:

Step-by-step explanation:

They sold 201 small bags

and they sold 83 large bags

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3 years ago

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Suppose that prior to conducting a coin-flipping experiment, we suspect that the coin is fair. How many times would we have to f

STALIN [3.7K]

Answer: b) 84

Step-by-step explanation:

Let p be the prior estimate of the required proportion.

As per given , we have

p =0.5 (The probability of getting heads on a fair coin is 0.5)

Significance level : $\alpha: 1-0.90=0.10\\$

Critical z-value (using z-value table ) : $z_{\alpha/2}=1.645$

Confidence interval width : w= 0.18

Thus , the margin of error : $E=\dfrac{w}{2}=0.09$

Formula to find the sample size ( if prior estimate of proportion is known.):-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2$

Substitute the values , we get

$n=0.5(1-0.5)(\dfrac{1.645}{0.09})^2$

Simplify ,

$n=83.5192901235\approx84$ [Round of to the next whole number.]

Hence, the number of times we would have to flip the coin =84

hence, the correct answer is b) 84

8 0

3 years ago

PLEASE HELP .!!! ILL GIVE BRAINLIEST.. *EXRTA POINTS* .. DONT SKIP :(( ! ILL GIVE 40 POINTS .

alexira [117]

Answer:

x=1 y=2.5

Step-by-step explanation:

4 0

2 years ago

Could you hlp me now

avanturin [10]

Answer: A

Step-by-step explanation:

The ratio is simply 2:5

You are comparing the two times

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3 years ago

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By using Associative, Commutative, and Distributive Properties in performing operations on complex numbers and polynomials, you would be able to simplify correctly and simply. To combine complex numbers, you must distribute any coefficients in front of the parentheses. Then identify andcombine like terms by combining the real number parts and the imaginary number parts separately.

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3 years ago

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